In the presentation recording scenario there are two aspects regarding the user interface: How the recording is done (i.e., how the presenter or his/her assistants have to interact with the recording tools (hardware and software)), and how users can access the produced multimedia documents (i.e., how replay, as well as search and navigation in the files can be done comfortably and efficiently). In this demonstration, we will illustrate Authoring on the Fly (AOF), a system for presentation recording which provides new approaches and solutions for both of these issues. Keywords Automatic presentation recording; classroom teaching and ubiquitous computing; searching, browsing, and interacting with multimedia data; information retrieval interfaces